Power storage device and electronic device

Abstract

To improve the flexibility of a power storage device, or provide a high-capacity power storage device. The power storage device includes a positive electrode, a negative electrode, an exterior body, and an electrolyte. The outer periphery of each of the positive electrode active material layer and the negative electrode active material layer is a closed curve. The exterior body includes a film and a thermocompression-bonded region. The inner periphery of the thermocompression-bonded region is a closed curve. The electrolyte, the positive electrode active material layer, and the negative electrode active material layer are in a region surrounded by the thermocompression-bonded region.

What is claimed is: 
     
       1. A power storage device comprising:
 an electrode; and 
 an exterior body, 
 wherein an outer periphery of the exterior body comprises a first side, a second side, and a vertex, 
 wherein the vertex is a cross point of the first side and the second side, 
 wherein the distance between the outer periphery of the electrode and the vertex is larger than the distance between the outer periphery of the electrode and a part of the first side, 
 wherein a part of the outer periphery of the electrode is a curved line, 
 wherein the exterior body comprises a film having a thermocompression-bonded region, 
 wherein an inner periphery of the thermal compression-bonded region is a closed curve, and 
 wherein the closed curve include no vertex. 
 
     
     
       2. The power storage device according to  claim 1 ,
 wherein the outer periphery of the exterior body comprises more than four vertexes. 
 
     
     
       3. The power storage device according to  claim 1 ,
 wherein the outer periphery of the electrode includes a part of a circle. 
 
     
     
       4. The power storage device according to  claim 1 ,
 wherein the distance between the inner periphery of the thermocompression-bonded region and the vertex is larger than the distance between the inner periphery of the thermocompression-bonded region and a part of the first side. 
 
     
     
       5. The power storage device according to  claim 1 ,
 wherein the power storage device has flexibility. 
 
     
     
       6. An electronic device comprising:
 the power storage device according to  claim 1 ; and 
 a housing having flexibility. 
 
     
     
       7. An electronic device comprising:
 the power storage device according to  claim 1 ; 
 a housing; 
 a display portion having flexibility; 
 a logic board; and 
 a belt portion, 
 wherein the display portion is bent and round. 
 
     
     
       8. The electronic device according to  claim 7 ,
 wherein the outer periphery of the display portion is a distorted closed curve. 
 
     
     
       9. The electronic device according to  claim 7 ,
 further comprising an antenna, a sensor, a microphone, and a speaker. 
 
     
     
       10. The electronic device according to  claim 7 ,
 wherein the electronic device is a watch-type device.